Calibrated 8 x 8 mm Square Shape Loose Natural Gemstones from GemS...

Some people by gems by color or price, but for many, it is best to buy gems by shape and size - especially if you're in need of a gem to replace a previous item that was lost or damaged. Calibrated Square shapes, facet cut and cabochon gems available now in 8 mm x 8 mm size range. Shop a wide range of calibrated gemstones by size online at wholesale from GemSelect.

As a general guideline, when it comes to 'calibrated' gems, they are not meant nor expected to be cut to exact measurements. For calibrated gemstones weighing under one carat, most jewelry settings will accommodate a gem which is within 0.2 mm of the calibrated size in order to fit a standard setting. For gemstones that weigh over one carat, a larger variance is acceptable, often around 0.3 mm or slightly higher even. This small variance can usually be accommodated for standard style settings. Round-cut gemstones should also have a greater variance in acceptable size when it comes to calibration; in fact it is usually possible to mount a round stone of any size in the closest standard setting.

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The website was very easy to navigate. We appreciated the details about each gem, and the sort and search features of the website were helpful and easy to use.

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Overall Rating -> 10

Great site

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Excellent experience!

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Overall Rating -> 10

Very easy. I have purchased a few times before and was satisfied each time. Thank you.

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My overall interaction with your website was pleasant, as always.

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I have used Gem Select many times over the past 10 years and have always been happy with the product & services

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Great selection, I love your site! Great product visibility, information, etc.

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Overall Rating -> 10

The website is easy to navigate and has a great selection. I am an amateur silver smith casting jewelry with stones

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Overall Rating -> 10

i love this site, the gems are always of good quality, i've been buy gifts from the site for 10 years, love it

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Overall good, shipping prices just seem a little on the high side.

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Overall Rating -> 10

I love your selection of gems. My only complaing is I wish I could put in a page number to return to that page.When there are over 60 pages of gems it is hard to return to a page with a gem I am considering.

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Gemstones A-Z

Buy Square Shape 8x8 mm Gems

23.93 ct Oval Obsidian, 32 x 20.8 mm From the United States

16.29 ct Oval Rainbow Moonstone, 20.4 x 13 mm From the United States

24.45 ct Marquise Hematite, 27.3 x 13 mm From Brazil

1.15 ct Round Buff Top Strawberry Quartz, 7.2 mm From Russia

26.4 ct Odd Shaped Druzy Azurite, 22.6 x 17.5 mm From the United States

5.28 ct Baguette Malachite, 10 x 7.4 mm From Congo

7.62 carat Pear Shape Amethyst, loose Certified Amethyst from Brazil, Natural Untreated Gem, 16.1 x 11.9 mm

4.23 carat Yellow Citrine, Emerald Cut loose Citrine from Brazil, Natural Untreated Gem, 12 x 9.9 mm

0.39 carat Orange Sapphire, Pear Shape loose Sapphire from Tanzania, Natural Gem, 4.8 x 4 mm

5.42 carat Blue Aquamarine, Oval loose Aquamarine from Madagascar, Natural Untreated Gem, 10.9 x 9.8 mm

44.26 ct Oval Jasper, 43.1 x 24.1 mm From Indonesia

0.21 carat Round Ruby, loose Certified Ruby from Myanmar, Natural Gem, 3.5 mm

0.9 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.9 x 5.3 mm

2.02 carat Orange Zircon, Diamond-Cut loose Zircon from Tanzania, Natural Untreated Gem, 7 mm

3.76 ct Black Star Sapphire, 10.1 x 8.1 mm Oval Cut From Thailand

1.5 carat Orange Hessonite Garnet, Oval loose Hessonite Garnet from Madagascar, Natural Untreated Gem, 7.7 x 6.3 mm

1.28 ct Pink Morganite, 7.5 mm Round Cut From Afghanistan

8.44 ct Heart Rose Cut Onyx, 10.4 x 10.3 mm From Sri Lanka

7.34 carat Swiss Blue Topaz, Emerald-Cut loose Topaz from Brazil, Natural Gems, 7.9 x 5.9 mm

2.12 carat Yellow Citrine, Oval loose Citrine from Brazil, Natural Untreated Gem, 9.2 x 7.3 mm

0.55 carat Green Sapphire, Cushion loose Sapphire from Tanzania, Natural Gem, 4.3 x 4.2 mm

3.01 carat Swiss Blue Topaz, Pear Shape loose Topaz from Brazil, Natural Gems, 7 x 5 mm

5.96 ct Oval Pietersite, 15.4 x 10.4 mm From Namibia

7.75 ct Oval Agate, 12 x 11.8 mm From Indonesia

6.22 ct Yellow Quartz, 11.4 x 11.2 mm Asscher Cut From Brazil

6.3 ct Oval Cut Smoky Quartz, 11.5 x 9.1 mm From Brazil

7.81 ct Princess Cut Rose Quartz, 11.8 x 11.6 mm From South Africa

19.09 ct Yellow Quartz, 15.3 x 15.3 mm Asscher Cut From Brazil

0.57 carat Oval Emerald, loose Certified Emerald from Colombia, Natural Gem, 6.2 x 4.3 mm

0.51 ct Octagon Cut Peridot, 5.8 x 3.8 mm From China

0.61 ct Loose Pink Sapphire, 6.4 x 6 mm Trillion Cut From Tanzania

5.18 carat Yellow Citrine, Pear Shape loose Citrine from Brazil, Natural Untreated Gems, 8.1 x 5.1 mm

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